The practice of Azan, in Islam the call to prayer, dates back to the time of the Prophet Muhammad in the early 7th century. The origin of Fajr Azan, specifically, can be traced back to the early Islamic community in Medina.

According to historical records, the first Azan was called by a companion of the Prophet named Bilal ibn Rabah. He was chosen by the Prophet to call the believers to prayer because of his beautiful voice and strong faith. Bilal would climb to the top of a high building or mountain and recite the words of the Azan to call the Muslims to prayer.

Initially, there was no specific Azan for the Fajr prayer. The practice of calling for Fajr prayer with a separate Azan was introduced during the reign of the second Caliph, Umar ibn Al-Khattab. Umar noticed that some people were missing the early morning prayer because they could not hear the Azan for Fajr amidst the noise of the early morning. He then ordered the appointment of a caller for Fajr prayer who would recite a separate Azan to ensure that people were not missing the important prayer.

Over time, the practice of reciting a separate Azan for Fajr became an established tradition in the Islamic world, and it is still practiced today. The words of the Fajr Azan have remained largely unchanged since their introduction, with the exception of minor variations in different parts of the world.